Hi everyone,
I am trying to print the solution of a test-system to a file/stdout.
For this I think it is best to use the compute_data() function which I
do in the following way:
After solving the system, I inserted
MeshBase::const_element_iterator el =
mesh.active_local_elements_begin();
const MeshBase::const_element_iterator end_el =
mesh.active_local_elements_end();
for ( ; el != end_el; ++el)
{
const Elem * elem = *el;
for(unsigned int i=0; i<elem->n_nodes(); i++){
Point q_point=elem->point(i); // how are points enumerated??
FEComputeData data(equation_systems, q_point);
data.init();
FEInterface::compute_data(3, fe_type, elem, data); //fe_type
is declared before already
out<<q_point<<" ";
const unsigned int n_dof = data.shape.size();
for(unsigned int j=0; j<n_dof; j++){
out<<data.shape[j]<<" "; // how do I make the output in
best case??
}
out<<std::endl;
}
}
(Here, I use the example miscellaneous_ex1 as starting point). However,
as in the example, I want to use infinite elements as well and than the
calculation ends with the error
Assertion `-1.-1.e-5 <= v && v < 1.' failed.
Stack frames: 10
0: libMesh::print_trace(std::ostream&)
1: libMesh::MacroFunctions::report_error(char const*, int, char const*,
char const*)
2:
/home/tm162/bin/libmesh/libmesh-1.0/.libs/libmesh_dbg.so.0(+0x135da7d)
[0x2aeffb645a7d]
3: libMesh::InfFE<3u, (libMesh::FEFamily)11,
(libMesh::InfMapType)0>::eval(double, libMesh::Order, unsigned int)
........
As far as I understand the problem, the function InfFE::compute_data()
(in src/fe/inf_fe_static.C) ist called.
Therein, the parameter v is set (line 249) to the z-coordinate of the
point of evaluation (which is contrary to my understanding of the
parameter v) and than evaluated in InfFE::eval()
(src/fe/inf_fe_map_eval.C) in line 316 which requires v to be in -1<v<1
as the assertion says.
So my main question is: Am I using the function in the way it is thought
to be used and would you agree on my interpretation of what happens?
I would appreciate any help with this, either by correcting me with how
to use it or by suggesting solutions.
Thanks in advance,
Hubert
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